For selected values of and the angular-momentum quantum number , the bound-state eigenvalues and eigenfunctions are determined. You may choose to display the energy diagram, the radial functions or contour plots of the eigenfunctions. The potential energy includes the centrifugal contribution. For either or 1, radial functions for the first three states are plotted, with the vertical blue line marking the radius . In the contour plots, the wavefunctions are positive in the blue regions, negative in the white regions.